What I want in Android 4.3? The stability of Jelly Bean 4.1, the extra features of Jelly Bean 4.2, the ability to skin the OS anyway YOU like (change icons, statusbar appearance, etc.), root access out of the box (hidden from the average consumer deep within developer settings, of course), customize CPU voltage and profile activity, option to limit RAM usage on an application and the ability to choose which UI of android to use at any time. (Whether phone, phone+navbar, phablet or tablet) I also want OEM Android skins GONE. Manufacturers such as Samsung can just implement the features they want on their handsets through stock vanilla android, therefore eliminating the need to add such outlandish skins as well as the problem with updating Android due to OEM versions of Android.
I know most of these options are attainable via custom ROMs such as CyanogenMod, ParanoidAndroid, etc. but it would be great to have such options right out of the box already to add emphasis on Android's "customizability".